How can I make the Control Center slider editable?

Question

I\'m working on an app that will play sound files. If I open apple music app, the slider let me moving between the song where I am.

Other apps like spotify

Answer 1

There is the changePlaybackPositionCommand API with the associated Event MPChangePlaybackPositionCommandEvent.positionTime (see https://developer.apple.com/library/ios/releasenotes/General/iOS91APIDiffs/Objective-C/MediaPlayer.html)

I tried

[commandCenter.changePlaybackPositionCommand
                     addTarget: self
                        action: @selector( onChangePlaybackPositionCommand: )]

with the associated method

- (MPRemoteCommandHandlerStatus) onChangePlaybackPositionCommand:
                                     (MPChangePlaybackPositionCommandEvent *) event
{
    NSLog(@"changePlaybackPosition to %f", event.positionTime);
    return MPRemoteCommandHandlerStatusSuccess;
}

but the cursor is still not movable and the method is not called. I guess I still miss something